<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色 -->
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表   -->
      <el-table :data="rolesList" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <!-- 栅格布局，一行分成24列 -->
            <el-row
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
            >
              <!-- 一级权限 占5列 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)">{{ item1.authName }}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>

              <!-- 二、三级权限 占19列 -->
              <el-col :span="19">
                <!-- 二级权限 -->
                <el-row
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                  :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row, item2.id)"
                    >{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="(item3, i3) in item2.children"
                      :key="i3"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                    >{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
            <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
            <el-button
              size="mini"
              type="warning"
              icon="el-icon-setting"
              @click="showSetRightDialog(scope.row)"
            >分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 分配权限对话框 -->
    <el-dialog
      title="权限分配"
      :visible.sync="showSetRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
    >
      <!-- 树形控件 -->
      <el-tree
        :data="rightList"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        ref="treeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="showSetRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>
<script>
export default {
  data() {
    return {
      //所有角色
      rolesList: [],
      //控制权限对话框的显示/隐藏
      showSetRightDialogVisible: false,
      //所有权限数据
      rightList: [],
      //树形控件的绑定对象
      treeProps: {
        label: "authName",
        children: "children"
      },
      //默认选择中的权限
      defKeys: [],
      //分配权限的角色id
      roleId: ''
    };
  },
  created() {
    this.getRolesList();
  },
  methods: {
    //获取所有角色
    async getRolesList() {
      const { data: res } = await this.$http.get("roles");

      if (res.meta.status !== 200) {
        return this.$message.error("获取角色列表失败");
      }

      this.rolesList = res.data;
      console.log(this.rolesList);
    },
    //根据id删除权限
    async removeRightById(role, rightId) {
      //弹出确认框
      const cnofirmResult = await this.$confirm(
        "此操作将永久删除该权限, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning"
        }
      ).catch(err => err); //取消则直接返回

      //取消删除
      if (cnofirmResult !== "confirm") {
        return this.$message.info("已取消删除");
      }
      //确认删除
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      );
      if (res.meta.status !== 200) {
        return this.$message.error("权限删除失败");
      }

      //重新渲染组件
      role.children = res.data;
    },

    //分配权限框
    async showSetRightDialog(role) {
      this.roleId = role.id
      const { data: res } = await this.$http.get("rights/tree");
      if (res.meta.status !== 200) {
        return this.$message.error("获取权限信息失败");
      }
      //保存数据到data中
      this.rightList = res.data;
      //递归获取三级权限id
      this.getLeafKeys(role, this.defKeys);
      this.showSetRightDialogVisible = true;
    },
    //递归获取三级权限的id，保存到defKeys数组
    getLeafKeys(node, arr) {
      //当前节点没有children属性，则为三级节点
      if (!node.children) {
        return arr.push(node.id);
      }

      node.children.forEach(item => this.getLeafKeys(item, arr));
    },
    //清空对话框权限数组
    setRightDialogClosed() {
      console.log("更新");
      this.defKeys = [];
      console.log(this.defKeys);
    },
    //分配权限给角色
    async allotRights() {
      const keys = [
        this.$refs.treeRef.getCheckedKeys(),
        this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idStr = keys.join(',')
      const {data: res} = await this.$http.post(`roles/${this.roleId}/rights`, {rids: idStr})

      if(res.meta.status !== 200){
        return this.$message.error('分配权限失败')
      }

      this.$message.success('分配权限成功')
      this.getRolesList()
      this.showSetRightDialogVisible = false
    }
  }
};
</script>
<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-top: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>